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In-situ ammonia stripping with alkaline fermentation of waste activated sludge to improve short-chain fatty acids production and carbon source availability.
Bioresource Technology ( IF 11.4 ) Pub Date : 2020-01-10 , DOI: 10.1016/j.biortech.2020.122782
Min Ye 1 , Jinghuan Luo 1 , Sitong Zhang 1 , Huan Yang 1 , Yu-You Li 2 , Jianyong Liu 1
Affiliation  

Alkaline fermentation of waste activated sludge (WAS) to produce short-chain fatty acids (SCFAs) has been proved to be promising to develop internal carbon source for denitrifying processes in municipal wastewater treatment plants. However, a large amount of ammoniacal nitrogen also releases during fermentation, resulting in inhibition of acidogenic process and reduction of carbon source availability. Alkaline fermentation of WAS combined with in-situ ammonia stripping was proposed to improve SCFAs production and carbon source availability simultaneously. The results showed that a maximal SCFAs production of 308.7 ± 4.8 mg chemical oxygen demand/g volatile suspended solid was achieved under the pH = 10 + In-situ ammonia stripping, which was 21.7% and 141.5% higher than that of the pH = 10 and the control, respectively. Most of the ammoniacal nitrogen was stripped out, and the WAS-derived SCFAs availability as carbon source increased by 103.2%. These findings indicate in-situ ammonia stripping could make alkaline fermentation of WAS more practical.

中文翻译:

原位氨汽提法与废活性污泥进行碱性发酵,以改善短链脂肪酸的生产和碳源的利用率。

事实证明,将废活性污泥(WAS)进行碱发酵以生产短链脂肪酸(SCFA),有望为市政废水处理厂的反硝化工艺开发内部碳源。但是,发酵过程中还会释放大量氨氮,从而抑制产酸过程并降低碳源的利用率。有人提出将WAS进行碱性发酵与原位氨汽提相结合,以同时提高SCFA的产量和碳源的利用率。结果表明,在pH = 10 +原位氨汽提的条件下,最大SCFA产量为308.7±4.8 mg化学需氧量/ g挥发性悬浮固体,比pH = 10时分别高21.7%和141.5%。和控件分别。去除了大部分氨氮,随着碳源的增加,源自WAS的SCFA的可用性增加了103.2%。这些发现表明原位氨汽提可以使WAS的碱性发酵更加实用。
更新日期:2020-01-11
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